English verb conjugation
SHOULD MASH

Regular verb: mash - mashed - mashed

Affirmation

Simple form	V-ing form
I'd mash you'd mash he'd mash we'd mash you'd mash they'd mash	I'd be mashing you'd be mashing he'd be mashing we'd be mashing you'd be mashing they'd be mashing
Perfect	V-ing perfect
I should've mashed you should've mashed he should've mashed we should've mashed you should've mashed they should've mashed	I should've been mashing you should've been mashing he should've been mashing we should've been mashing you should've been mashing they should've been mashing

Negation

Simple form	V-ing form
I shouldn't mash you shouldn't mash he shouldn't mash we shouldn't mash you shouldn't mash they shouldn't mash	I shouldn't be mashing you shouldn't be mashing he shouldn't be mashing we shouldn't be mashing you shouldn't be mashing they shouldn't be mashing
Perfect	V-ing perfect
I shouldn't have mashed you shouldn't have mashed he shouldn't have mashed we shouldn't have mashed you shouldn't have mashed they shouldn't have mashed	I shouldn't have been mashing you shouldn't have been mashing he shouldn't have been mashing we shouldn't have been mashing you shouldn't have been mashing they shouldn't have been mashing

Interrogative form

Simple form	V-ing form
should I mash? should you mash? should he mash? should we mash? should you mash? should they mash?	should I be mashing? should you be mashing? should he be mashing? should we be mashing? should you be mashing? should they be mashing?
Perfect	V-ing perfect
should I have mashed? should you have mashed? should he have mashed? should we have mashed? should you have mashed? should they have mashed?	should I have been mashing? should you have been mashing? should he have been mashing? should we have been mashing? should you have been mashing? should they have been mashing?

Interro-negative form

Simple form	V-ing form
shouldn't I mash? shouldn't you mash? shouldn't he mash? shouldn't we mash? shouldn't you mash? shouldn't they mash?	shouldn't I be mashing? shouldn't you be mashing? shouldn't he be mashing? shouldn't we be mashing? shouldn't you be mashing? shouldn't they be mashing?
Perfect	V-ing perfect
shouldn't I have mashed? shouldn't you have mashed? shouldn't he have mashed? shouldn't we have mashed? shouldn't you have mashed? shouldn't they have mashed?	shouldn't I have been mashing? shouldn't you have been mashing? shouldn't he have been mashing? shouldn't we have been mashing? shouldn't you have been mashing? shouldn't they have been mashing?